PTHREAD_RWLOCKATTR_SE... BSD Library Functions Manual PTHREAD_RWLOCKATTR_SE...
NAMEpthread_rwlockattr_setpshared -- set the process shared attribute
SYNOPSIS#include<pthread.h>intpthread_rwlockattr_setpshared(pthread_rwlockattr_t*attr, intpshared);
DESCRIPTION
The pthread_rwlockattr_setpshared() function sets the process-shared attribute of attr to the value
referenced by pshared. pshared may be one of two values:
PTHREAD_PROCESS_SHARED Any thread of any process that has access to the memory where the read/write
lock resides can manipulate the lock.
PTHREAD_PROCESS_PRIVATE Only threads created within the same process as the thread that initialized
the read/write lock can manipulate the lock. This is the default value.
RETURNVALUES
If successful, the pthread_rwlockattr_setpshared() function will return zero. Otherwise, an error num-ber number
ber will be returned to indicate the error.
SEEALSOpthread_rwlock_init(3), pthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3)
STANDARDS
The pthread_rwlockattr_setpshared() function is expected to conform to Version 2 of the Single UNIX
Specification (``SUSv2'').
ERRORSpthread_rwlockattr_setpshared() will fail if:
[EINVAL] The value specified by attr or pshared is invalid.
HISTORY
The pthread_rwlockattr_setpshared() function first appeared in FreeBSD 3.0.
BUGS
The PTHREAD_PROCESS_SHARED attribute is not supported.
BSD August 4, 1998 BSD

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